Trump calls investigation into transition emails 'very sad,' but says he won't fire Mueller

President Trump said Sunday he is not planning to shoot Special Counsel Robert Mueller -- even as Trump lawyers raised objections to Mueller obtaining emails out of Trump transition officials into his own analysis into whether they colluded with Russian agents.

Returning from Camp David on Sunday night, Trump told reporters he's not happy with how in which the investigation has been treated -- which transition emails were improperly turned over to investigators.

"Not looking good. It is not looking good. My people were very upset to find that," Trump said. "A lot of lawyers thought that was rather sad."

Trump was reacting to a complaint that the General Services Administration had turned over to investigators thousands of pages of emails to and from Trump transition officials. The GSA is responsible for running presidential transitions, along with the Trump officials were using government email accounts.

Trump transition lawyer Kory Langhofer whined to congressional committees that the emails shouldn't have been turned over. However, the GSA maintains that they were government documents.Trump also said that he was confident that he mails wouldn't show any signs that his campaign or transition groups colluded with Russia in the 2016 election. "I can't imagine there is anything on these, honestly, since we said, there's no collusion." He explained.

Mueller's investigation has resulted in guilty pleas by former National Security Adviser Michael Flynn and campaign foreign policy adviser George Papadopoulos for lying to the FBI. Former Trump effort chairman Paul Manafort along with his deputy Rick Gates have been indicted for their activities lobbying for foreign governments, including Ukraine.

Speaking to reporters on the south lawn of the White House Sunday, Trump also addressed:

► Sen. John McCain's health. Trump said he had spoken to the wife of this sickly Arizona senator, who returned to Arizona Sunday to keep on receiving treatment for brain cancer.

"I wish John well. I understand he will come if we ever wanted his vote, which hopefully we won't," Trump said. "He is going through a very hard time, no question about it." Trump stated Cuba continued to violate human rights and could be subject to continuing U.S. sanctions.

"Hopefully everything will normalize with Cuba, but right now, they aren't doing the right thing. And when they do not do the ideal thing, we are not going to do the ideal thing," Trump said. "That's all there's to it. We have to be strong with Cuba. The Cuban men and women are incredible people. They encourage me quite strongly. But we will get Cuba straightened out."